Electric speed governor



April 22,1930. w BUTLER 1,755,313

ELECTRIC SPEED GOVERNOR Filed Feb. 26, 1927 yi view, which willbeapparent as the descripthe scope of what is claimed, without departto the outer side of the locomotive or car Patented Apr, 22, 1930 UNITED; STA

WIL IAM EBUTL R, or 1 MEN-TOF I" EAST01\T,. PENNSYLVANIA int-norms SPEED eovEn-non.

' Application file -F brua y is; 193 7." Serial no. 171,184.

in accordance with variations in speed therej of, and it is the primary object oftheinvention to provide a novel, and improved electri- 10 cal device ofthat kind whereby electrical currentot voltages varying in proportion to the f 1 peed areindication or control. I

VAn other object of the invention is the pro-,

15 vision of an: electric speed; governor" which may be applied directly to the wheel, of a locomotive or railwaycar so as tobe carried by and also actuated by, said wheel,

With the foregoing-and other objects in tionproceeds, the inventionresides in the construction and arrangement of parts, as v hereinafter described and claimed, it being understood that ,changesrcan be made within ing from the spirit of the invention. j p

The invention is illustrated in the accompanying drawing, wherein" the deviceisj shown attached to a wheel, with portions I shown in section and portions shown in eleva-' J tion, and the electrical circuits illustrated diagrammatically. p

" In carrying out the invention there is provided an electrical generator or dynamo comprising the rotor 1 .which provides a casing p to' enclose the other parts,- and said rotor is of iron or other magneticmaterial; Theinner end of the rotor is opensand is applied wheel 2, as shown,although;the device may beused'for other purposes for whichit is suitable. Assshown, the inner end ofthe v rotor 1 has'a fiangej3 secured by bolts 4 or otherwise to the face of the'wheel with the 7 device concentricwith the wheel and its axle.

A stator 5, comprising a tubulararmature of iron or other magnetic material, is mountedin the rotor-1 by means of suitableantifriction bearings 6 and/Z, and the outer termigenerated for purpose of speed" The slidingjand flexible joint 10 permits-the -"ehicl'e body or frame to move upwardly and fon'whichi the fieldcoils15 are wound, the 'ipole portlons 14moving past the portions12 inductive relation'thereto asyin an ordicarries a commutator having the segments *21'to which the conductors16 are electricaland brushes 23, whereby electrical current nal of the stator 5jprojects through an open ing in the outer end of the rotor. 1

9 The stator 5 is prevented from rotatin with the wheel 2 by being suitably connected;

with a non-rotating member such as the" frame or body of the locomotive, car or other vehicle. As shown, an arm 8 is held between collars -9 secured on the outer protruding terminal of the stator 5 and has a sliding and oscillatory connection, as at 10, with am'em ber 11 secured tothe non-rotating member, thereby'preventing the stator 5ftrom rotating, but permitting of relative movements of the-wheel truck and vehicle bodyorframe.

downwardly on its spring mounting, and' "also permitsthe truck tobe angled when negotiating curves. v p Y l The stator or armature 5 has the ,pole per-1 "tions orcores 12 on'which the armature coils are wound, and the rotor or casing'l has inwardly extending pole portions or coresl l r nary electrical generator .o'r'd'ynamo The coils 13 are'connected 1n series-with conductors 16, connected to thesolenoid 17 or other 7,

l on

device which is controlled by the governor. 'The'conductors 16 are preferably protected within a flexible "conduit or hose 18 having "one end connected,--;as at '19, with the'outer "end-of'the'sta'tor 5, and said conduit is held by aclamp 20 carried by the vehicle body or g-As-s'hown," adirect current generator is f r employed, and the inner end of the stator 5 1y connected, and the rotor 1 has brush'holdersf22 in which brushes 23 are mounted to engage the commutator. I The coils 15 are connected inseries with the brush holders 22 generated in the coils '13 is unidirectional,

whereas the current'in thecoils 15 is reversed in synchronism withtherotation of the roi tor. By using collector rings in'lieu of the, commutator, as well'known in the art, the

device may operate as an alternating current generator, so that the device may be constructed either as adirect current generator or as an alternating current generator. Furthermore, the rotor 1 may constitute a permanent magnet, without using the coils 15, so asto operate like a magneto. i V i The rotor 1 being securedto the wheel 2 will be bodily carried thereby and will also be rotated with the wheel so as to directly drive the generator, and the wheel 2 being'of iron will assist in completing the magneti circuit of the rotor and stator.

It will be apparent that the voltage of the current generated, will vary in proportion to the speed ofrotation of the wheel 2, and this may be taken advantage of for controlv ling the locomotive or other 'mechanism.

Thus, the solenoid or electromagnet 17 mayi control electrical circuits for making and breaking the circuits according to variations i inspeed,such.as for the purpose of controllingthe speed of the train, or the device 17 may be an electric tachometer or speed indicator for indicating the speed ofthe train, p

or the like. As shown, the device 17 is a solenoid, the core of which operates a plurality of switches or bridges for difi'erent electrical circuits, in order that the movable member is moved tovarious positions in accordance with the amount of energlzation; of the solenoid. The solenold 17 is energized solely from the armature winding or coils 13 so as to be energized in proportion to the '7 speed of rotation of the rotor. By attaching i the device directly tothe wheel '2 this provides for positive actuation of the device, without danger ofsli'ppage or breakage-of theconnection between "the devicejand the driving member, and the use of a belt, gearing or other connectionbetween the device and driving member is also eliminated. 7

Having thus described the invention, Wha i isclaimed as new is Anelectrical gOVQI'IlOI'COIIlPIlSlIlg a rotor casing having a magnetic field, one end of i I the casing beingopen and the other end closed,"t-he casing havingimeans at its open endfor securing it to the face of a locomotive or car wheel, or the'like, anarmature journaled within the casing and projecting through said closed endiof the casing, means connected to the proje'ctingportion ofc-the armature to prevent rotation thereof, and electrical translating means connected electrically with said armature.

"In testimony whereof I hereunto aflix my signature.

WILLIAM E. BUTLER. 

